import os
import pygame

class MusicPlayer(object):
    """音乐播放器类"""
    res_path='./res/sound/'
    def __init__(self,music_file):
        """初始化音乐播放器"""

        #加载背景音乐
        pygame.mixer.music.load(self.res_path+music_file)
        pygame.mixer.music.set_volume(0.2)

        #初始化音效的字典
        self.sound_dict={}
        files=os.listdir(self.res_path)
        for file in files:
            if file==music_file: #背景音乐不需要处理
                continue
            sound=pygame.mixer.Sound(self.res_path+file)
            self.sound_dict[file]=sound


    @staticmethod
    def play_music():
        """播放背景音乐"""
        pygame.mixer.music.play(-1)
    @staticmethod
    def pause_music(is_pause):
        """根据暂停状态决定是否播放背景音乐"""
        if is_pause:
            pygame.mixer.music.pause()
        else:
            pygame.mixer.music.unpause()


    def play_sound(self,wav_name):
        """根据文件名，播放音效"""
        self.sound_dict[wav_name].play()
